题目内容
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Low compression pressure in a diesel engine can be caused by_____________.
A.improperly seating intake valves
B.leaking cylinder liner seal rings
C.late fuel injection timing
D.carbon deposits on the piston
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更多“Low compression pressure in a …”相关的问题
Cooling the intake air supplied to a diesel engine will _____.
A.reduce mean effective pressure
B.decrease average compression pressure
C.decrease air charge density
D.increase power output
A.① and ②
B.② and ③
C.① ② and ③
Low compression in a diesel engine can be caused by ________.
A.clogged coolant passages
B.a leaking cylinder head gasket
C.low fuel oil pressure
D.worn or broken cylinder liner sealing rings
A.Higher compression ratios create higher temperature
B.Higher temperatures create higher compression ratios
C.low temperatures create higher compression ratios
D.Higher compression ratios create low temperatures
A．worn cylinder
B．broken piston rings
C．any of A and B
D．none of the above
A.a worn cylinder
B.broken piston rings
C.any of A and B
D.none of the above
Low cylinder compression pressure and a high exhaust temperature may indicate ________.
A.early fuel injection timing
B.leaking valves
C.a continuously open scavenge air port
D.low cooling water temperature
Which feature is not associated with the compression molding technique？
A．Producing parts with complex shapes and close tolerances
B．High part-to-part uniformity and reproducibility
C．Excellent control of fiber-to-resin ratios and low void content
D．Producing parts with constant cross-section shape in a continuous way
A.Higher compression ratios create higher temperature
B.Higher temperatures create higher compression ratios
C.low temperatures create higher compression ratios
D.Higher compression ratios create low temperatures
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